President Barack Obama may change the United States' plan to withdraw virtually all its troops from Afghanistan by the end of 2016, his new defense secretary said Saturday during a visit to the central Asian nation -- an indication that the White House is considering extending the U.S. troop presence there beyond that year.

The United Nations is looking into claims that ISIS -- already considered the wealthiest terrorist group on record -- may be harvesting organs from slain civilians and gaining financial benefits by trafficking the body parts, officials said Wednesday.

Months after Iraqi troops dropped their weapons and ran for their lives in Mosul, up to 25,000 of them are expected to head back there in April or May to try to retake the city from ISIS, according to a U.S. official.